Application of Waveform Weighting for a Frequency-Invariant Transmit Beampattern

Journal article (2017)

Authors

Faruk Uysal University of Oklahoma, Microwave Sensing, Signals & Systems - EEMCS
Zach Dunn University of Oklahoma
Rafael Rincon NASA Goddard Space Flight Center
Research Group
Microwave Sensing, Signals & Systems (EEMCS) (TU Delft)
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Published Date

07-02-2017

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Microwave Sensing, Signals & Systems

Abstract

Advanced radar systems rely on multichannel, wideband operation. NASA's Ecosystem SAR (EcoSAR) and second-generation digital beamforming SAR [1]–[3] use active array architectures, where an active array radar system contains independent transmit and receive chains with unique amplifiers for each antenna element in the multichannel system. These radar systems have an independent arbitrary waveform generator for each channel and are designed to address wideband transmit beamforming. Unlike conventional narrowband beamforming, which only require a unique set of beamsteering coefficients per look angle, wideband beamforming requires beamsteering coefficients that vary with both look angle and frequency.

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